Which trenchless method is specifically named to use an auger bore?

• A. Jack and bore
• B. Auger bore
• C. Missile bore
• D. Impact moling

Answer: (B)

Auger bore specifically uses an auger at the front of the drill string to excavate soil and form the bore as the line is advanced. The auger both cuts and conveys the spoil out of the hole, allowing conduit to be installed with minimal surface disruption over short distances. This is why the method is named for the auger itself.

Other trenchless methods work differently: jack and bore relies on hydraulic jacking to push a bore and casing through the ground; missile bore uses a guided bore launched like a “missile” from one point to another; impact moling uses a percussion hammer to create the bore and pull in the pipe.